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∫ 1 X ( 3 + Log X ) D X - Mathematics

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Question

\[\int\frac{1}{x (3 + \log x)} dx\]
Sum
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Solution

` Here, we  are" considering "log  x  as    log_e x . `
\[\text{Let I} = \int\frac{1}{x\left( 3 + \log x \right)}dx\]
\[\text{Putting }\log x = t\]
\[ \Rightarrow \frac{1}{x} = \frac{dt}{dx}\]
\[ \Rightarrow \frac{dx}{x} = dt\]
\[ \therefore I = \int\frac{dt}{3 + t}\]
\[ = \text{log }\left| 3 + t \right| + C\]
\[ = \text{log }\left| 3 + \text{log x }\right| + C \left[ \because t = \text{log x} \right]\]

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Chapter 19: Indefinite Integrals - Exercise 19.08 [Page 47]

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RD Sharma Mathematics [English] Class 12
Chapter 19 Indefinite Integrals
Exercise 19.08 | Q 16 | Page 47

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